sitongia@hao.ucar.edu (Leonard Sitongia) (03/20/90)
I'm thinking about getting either the Microbotics 8-UP! or SupraRam2000 memory boards. Are they compatible with the A2620 board? What are the constraints on memory not on the coprocessor board, that allow the 68020 to use the memory. I guess the memory has to be faster than some rate. By the way, both boards are available at the same price. Can someone help me decide between the two? :-) Thanks. -- -Leonard E. Sitongia System Manager (303) 497-1509 USPS Mail: High Altitude Observatory P.O. Box 3000 Boulder CO 80307 Internet: sitongia@hao.ucar.edu SPAN: NSFGW::"hao.ucar.edu!sitongia" [NSFGW=9580]
davidw@telxon.UUCP (David Wright) (03/20/90)
All memory boards are compatible, no matter what the speed. They
just aren't 32-bit memory. Only boards designed for the '020 board itself
will be 32 bit, and will need to be faster.
I would go with the SupraRAM board. I have one and have had no
problems with it.
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Amiga - The ONLY choice for personal computingdaveh@cbmvax.commodore.com (Dave Haynie) (03/21/90)
In article <6691@ncar.ucar.edu> sitongia@hao.ucar.edu (Leonard Sitongia) writes: >I'm thinking about getting either the Microbotics 8-UP! or SupraRam2000 >memory boards. I'm pretty sure either board works just fine. I've seen a SupraRam2000 used with some of the 32 bit systems, and I have an 8-UP in the lab which runs like a champ. >Are they compatible with the A2620 board? What are the constraints on >memory not on the coprocessor board, that allow the 68020 to use the >memory. Almost all of the constraints are on the Coprocessor board. The Coprocessor board must fully emulate a 68000 for any off-board memory cycles. As long as an expansion card is designed to the actual bus specifications (rather than the observed behavior of the bus, eg, what just happens to work) the expansion card should work in all Amiga backplanes with all Amiga coprocessors. >I guess the memory has to be faster than some rate. No, the Coprocessor card inserts wait states to access the expansion bus memory. >-Leonard E. Sitongia System Manager (303) 497-1509 -- Dave Haynie Commodore-Amiga (Systems Engineering) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy Too much of everything is just enough